E19
SMEG
Intermittent Overcurrent / Power Protection Trip
Microwave shows E19; appears intermittently during long cooking cycles.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Partially shorted magnetron, Failing high-voltage transformer, Loose mains or earth connection, Overloaded internal wiring
How to Fix / Troubleshooting
Safety: Overcurrent conditions can be dangerous. Unplug the microwave immediately if you smell burning or see smoke.
User checks:
- Ensure you are not exceeding the recommended duty cycle (continuous high-power operation) specified in the manual.
- Do not operate the microwave empty or with very small loads at full power.
- Try a shorter test cycle (30–60 seconds) with a cup of water. If E19 appears quickly, stop using the unit.
Technician actions:
- Measure current draw during operation and compare with rated values.
- Test the magnetron and HV transformer for shorts or insulation breakdown.
- Inspect wiring, connectors, and mains filter for heat damage.
Because this involves mains and HV overcurrent, professional diagnosis is required.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Transformer
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